package com.pureman.androidapp;

import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.ImageView;

import java.io.File;
import java.io.FileNotFoundException;

public class PictureActivity extends AppCompatActivity {

    private final static int SELECT_PIC = 0x123;
    private final static int TAKE_PIC = 0x124;
    private final static int CROP_PIC = 0x125;
    private Uri imageUri;
    private ImageView imgShow;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_picture);

        //初始化imageUri
        imageUri = Uri.fromFile(new File(Environment.getExternalStorageDirectory(), "test.jpg"));
        imgShow = (ImageView) findViewById(R.id.imgShow);
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        // TODO Auto-generated method stub
        switch (requestCode) {
            case SELECT_PIC:
                if (resultCode == RESULT_OK) {
                    try {
                        Bitmap bitmap = BitmapFactory.decodeStream(getContentResolver().
                                openInputStream(imageUri));//将imageUri对象的图片加载到内存
                        imgShow.setImageBitmap(bitmap);
                    } catch (FileNotFoundException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }
                }
                break;
            case TAKE_PIC:
                if (resultCode == RESULT_OK) {
                    cropImageUri(imageUri, 600, 600, CROP_PIC);
                }
                break;
            case CROP_PIC:
                if (resultCode == RESULT_OK) {
                    try {
                        Bitmap bitmap = BitmapFactory.decodeStream(getContentResolver().
                                openInputStream(imageUri));//将imageUri对象的图片加载到内存
                        imgShow.setImageBitmap(bitmap);
                    } catch (FileNotFoundException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }
                }
                break;
            default:
                break;
        }
        super.onActivityResult(requestCode, resultCode, data);
    }

    /**
     * 裁剪指定uri对应的照片
     *
     * @param imageUri：uri对应的照片
     * @param outputX：裁剪宽
     * @param outputY：裁剪高
     * @param requestCode：请求码
     */
    private void cropImageUri(Uri imageUri, int outputX, int outputY, int requestCode) {
        Intent intent = new Intent("com.android.camera.action.CROP");
        intent.setDataAndType(imageUri, "image/*");
        intent.putExtra("crop", "true");
        intent.putExtra("aspectX", 1);
        intent.putExtra("aspectY", 1);
        intent.putExtra("outputX", outputX);
        intent.putExtra("outputY", outputY);
        intent.putExtra("scale", true);
        intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);
        intent.putExtra("return-data", false);
        intent.putExtra("outputFormat", Bitmap.CompressFormat.JPEG.toString());
        intent.putExtra("noFaceDetection", true); // no face detection
        startActivityForResult(intent, requestCode);
    }

    public void cropPic(View view) {
        switch (view.getId()) {
            case R.id.btnCropFromGallery://从相册选择照片进行裁剪
                cropFromGallery();
                break;
            case R.id.btnCropFromTake://从相机拍取照片进行裁剪
                cropFromTake();
                break;
            default:
                break;
        }
    }

    /**
     * 从相机拍取照片进行裁剪
     */
    private void cropFromTake() {
        // TODO Auto-generated method stub
        Intent intent = new Intent();
        intent.setAction(MediaStore.ACTION_IMAGE_CAPTURE);//设置Action为拍照
        intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);//将拍取的照片保存到指定URI
        startActivityForResult(intent, TAKE_PIC);
    }

    /**
     * 从相册选择照片进行裁剪
     */
    private void cropFromGallery() {
        // TODO Auto-generated method stub
        Intent intent = new Intent();
        intent.setAction(Intent.ACTION_PICK);//Pick an item from the data
        intent.setType("image/*");//从所有图片中进行选择
        intent.putExtra("crop", "true");//设置为裁切
        intent.putExtra("aspectX", 1);//裁切的宽比例
        intent.putExtra("aspectY", 1);//裁切的高比例
        intent.putExtra("outputX", 600);//裁切的宽度
        intent.putExtra("outputY", 600);//裁切的高度
        intent.putExtra("scale", true);//支持缩放
        intent.putExtra("return-data", false);
        intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);//将裁切的结果输出到指定的Uri
        intent.putExtra("outputFormat", Bitmap.CompressFormat.JPEG.toString());//裁切成的图片的格式
        intent.putExtra("noFaceDetection", true); // no face detection
        startActivityForResult(intent, SELECT_PIC);
    }
}
